<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>优化节点添加</title>
</head>
<body>
    <script>

        // 不做任何优化

        for(var i = 0; i < 10; i++) {
            var oP = document.createElement('p')
            oP.innerHTML = i
            document.body.appendChild(oP)
        }

        // 优化
        // 文档碎片容器
        const fraEle = document.createDocumentFragment()
        for(var i = 0; i < 10; i++){
            var oP = document.createElement('p')
            oP.innerHTML = i
            fraEle.appendChild(oP)
        }
        document.body.appendChild(fraEle)

    </script>
</body>
</html>